Class Eval
java.lang.Object
org.elasticsearch.xpack.esql.core.tree.Node<LogicalPlan>
org.elasticsearch.xpack.esql.plan.QueryPlan<LogicalPlan>
org.elasticsearch.xpack.esql.plan.logical.LogicalPlan
org.elasticsearch.xpack.esql.plan.logical.UnaryPlan
org.elasticsearch.xpack.esql.plan.logical.Eval
- All Implemented Interfaces:
NamedWriteable,Writeable,PostAnalysisVerificationAware,TelemetryAware,Resolvable,GeneratingPlan<Eval>,SortAgnostic
public class Eval
extends UnaryPlan
implements GeneratingPlan<Eval>, PostAnalysisVerificationAware, TelemetryAware, SortAgnostic
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Nested Class Summary
Nested classes/interfaces inherited from class org.elasticsearch.xpack.esql.plan.logical.LogicalPlan
LogicalPlan.StageNested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable
Writeable.Reader<V>, Writeable.Writer<V> -
Field Summary
Fields -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected AttributeSetThis very likely needs to be overridden forQueryPlan.references()to be correct when inheriting.static AttributeSetcomputeReferences(List<Alias> fields) booleanbooleanfields()inthashCode()protected NodeInfo<? extends LogicalPlan> info()output()The ordered list of attributes (i.e.voidpostAnalysisVerification(Failures failures) Allows the implementer to validate itself.replaceChild(LogicalPlan newChild) withGeneratedNames(List<String> newNames) Create a new instance of this node with new outputAttributes using the given names.voidwriteTo(StreamOutput out) Methods inherited from class org.elasticsearch.xpack.esql.plan.logical.UnaryPlan
child, inputSet, outputSet, replaceChildrenMethods inherited from class org.elasticsearch.xpack.esql.plan.logical.LogicalPlan
analyzed, childrenResolved, optimized, preAnalyzed, resolved, setAnalyzed, setOptimized, setPreAnalyzedMethods inherited from class org.elasticsearch.xpack.esql.plan.QueryPlan
computeExpressions, expressions, forEachExpression, forEachExpression, forEachExpressionDown, forEachExpressionUp, references, transformExpressionsDown, transformExpressionsDown, transformExpressionsOnly, transformExpressionsOnly, transformExpressionsOnlyUp, transformExpressionsUp, transformExpressionsUpMethods inherited from class org.elasticsearch.xpack.esql.core.tree.Node
anyMatch, children, collect, collectFirstChildren, collectLeaves, doCollectFirst, forEachDown, forEachDown, forEachProperty, forEachPropertyDown, forEachPropertyOnly, forEachPropertyUp, forEachUp, forEachUp, nodeName, nodeProperties, nodeString, propertiesToString, replaceChildrenSameSize, source, sourceLocation, sourceText, toString, transformChildren, transformDown, transformDown, transformDown, transformNodeProps, transformPropertiesDown, transformPropertiesOnly, transformPropertiesUp, transformUp, transformUp, transformUpMethods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, waitMethods inherited from interface org.elasticsearch.xpack.esql.plan.GeneratingPlan
checkNumberOfNewNamesMethods inherited from interface org.elasticsearch.xpack.esql.capabilities.TelemetryAware
telemetryLabel
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Field Details
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ENTRY
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Constructor Details
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Eval
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Method Details
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writeTo
- Specified by:
writeToin interfaceWriteable- Throws:
IOException
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getWriteableName
- Specified by:
getWriteableNamein interfaceNamedWriteable
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fields
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output
Description copied from class:QueryPlanThe ordered list of attributes (i.e. columns) this plan produces when executed. Must be called only on resolved plans, otherwise may throw an exception or return wrong results. -
computeReferences
Description copied from class:QueryPlanThis very likely needs to be overridden forQueryPlan.references()to be correct when inheriting. This can be called on unresolved plans and therefore must not rely on calls toQueryPlan.output().- Overrides:
computeReferencesin classQueryPlan<LogicalPlan>
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computeReferences
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generatedAttributes
- Specified by:
generatedAttributesin interfaceGeneratingPlan<Eval>
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withGeneratedNames
Description copied from interface:GeneratingPlanCreate a new instance of this node with new outputAttributes using the given names. If an output attribute already has the desired name, we continue using it; otherwise, we create a new attribute with a newNameId.- Specified by:
withGeneratedNamesin interfaceGeneratingPlan<Eval>
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expressionsResolved
public boolean expressionsResolved()- Specified by:
expressionsResolvedin classLogicalPlan
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replaceChild
- Specified by:
replaceChildin classUnaryPlan
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info
- Specified by:
infoin classNode<LogicalPlan>
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equals
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hashCode
public int hashCode() -
postAnalysisVerification
Description copied from interface:PostAnalysisVerificationAwareAllows the implementer to validate itself. This usually involves checking its internal setup, which often means checking the parameters it received on construction: their data or syntactic type, class, their count, expressions' structure etc. The discovered failures are added to the givenFailuresobject.It is often more useful to perform the checks as extended as it makes sense, over stopping at the first failure. This will allow the author to progress faster to a correct query.
Example: the
Filterclass, which models the WHERE command, checks that the expression it filters on -condition- is of a Boolean or NULL type:@Override void postAnalysisVerification(Failures failures) { if (condition.dataType() != NULL && condition.dataType() != BOOLEAN) { failures.add(fail(condition, "Condition expression needs to be boolean, found [{}]", condition.dataType())); } }- Specified by:
postAnalysisVerificationin interfacePostAnalysisVerificationAware- Parameters:
failures- the object to add failures to.
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